TPS60120 Datasheet, PDF (1/27 Pages) Texas Instruments – REGULATED 3.3 V, 200-mA HIGH EFFICIENCY CHARGE PUMP DC/DC CONVERTERS

TPS60120, TPS60121, TPS60122, TPS60123, TPS60124, TPS60125
REGULATED 200-mA HIGH EFFICIENCY CHARGE PUMP
DC/DC CONVERTERS
SLVS257B – NOVEMBER 1999 – REVISED AUGUST 2000
features
D High Average Efficiency Over Input Voltage
Range Because of Special Switching
Topology
D Minimum 200-mA Output Current From an
Input Voltage Range of 1.8-V to 3.6-V
D Regulated 3.3-V or 3-V ±4% Output Voltage
D No Inductors Required, Low EMI
D Only Four External Components Required
D 55-µA Quiescent Supply Current
D 0.05-µA Shutdown Current
D Load Disconnected in Shutdown
D Integrated Low Battery and Power Good
Detectors
D Evaluation Module Available
(TPS60120EVM-142)
·
description
The TPS6012x step-up, regulated charge pumps
generate a 3.3-V or 3-V ±4% output voltage from
a 1.8-V to 3.6-V input voltage (two alkaline, NiCd,
or NiMH batteries). They can deliver an output
current of at least 200 mA (100 mA for the
TPS60122 and TPS60123), all from a 2-V input.
Four external capacitors are needed to build a
complete high efficiency dc/dc charge pump
converter. To achieve the high efficiency over a
wide input voltage range, the charge pump
automatically selects between a 1.5x or doubler
conversion mode. From a 2-V input, all ICs can
start with full load current.
The devices feature the power-saving pulse-skip
mode to extend battery life at light loads.
TPS60120, TPS60122, and TPS60124 include a
low battery comparator. TPS60121, TPS60123,
and TPS60125 feature a power-good output. The
logic shutdown function reduces the supply
current to a maximum of 1 µA and disconnects the
load from the input. Special current-control
circuitry prevents excessive current from being
drawn from the battery during start-up. This dc/dc
converter requires no inductors, therefore EMI is
of low concern. It is available in the small,
thermally enhanced 20-pin PowerPADt package
(PWP).
applications
D Applications Powered by Two Battery Cells
D Portable Instruments
D Battery-Powered Microprocessor Systems
D Miniature Equipment
D Backup-Battery Boost Converters
D PDAs, Organizers, Laptops
D MP-3 Portable Audio Players
D Handheld Instrumentation
D Medical Instruments (e.g., Glucose Meters)
D Cordless Phones
efficiency (TPS60120, TPS60121)
100
IO = 66 mA
90
80
VO = 3.3 V
TC = 25°C
70
IO = 116 mA
60
IO = 164 mA
50
IO = 216 mA
40
30
20
10
0
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
VI – Input Voltage – V
typical operating circuit
Input
1.8 V to 3.6 V
TPS60120
IN
OUT
Output
3.3 V
Ci
10 µF
R1
IN
LBI
R2
OUT
FB
LBO
CO
22 µF
R3
C1
2.2 µF
C1+
C2+
C1–
C2–
C2
2.2 µF
OFF/ON
ENABLE
PGND GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2000, Texas Instruments Incorporated
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